Question

To reduce the output offset voltage VooT  to zero

(a) Input offset voltage compensating network is added at the inverting input terminal

(b) Input offset voltage compensating network is added at the non-inverting input terminal

(c) Input offset voltage compensating network is added at the output terminal

(d) None of the mentioned

The question was asked in a job interview.

This question is from Input Offset Voltage in chapter Operational Amplifier Fundamentals of Linear Integrated Circuits

Answer 1

Right answer is (d) None of the mentioned

In simpler terms: To reduce the VooT   to zero, the external circuit is added at the input terminal of the op-amp that will give the flexibility of obtaining input offset voltage of proper amplitude and polarity. The input terminal can be inverting or non-inverting.